Another good looking project bdfd, nice one too, close to your heart i imagine being with solar panels and rain collection. if i may ask, when you create your own furniture, do you create the door handles or get them from a site?

@ mirakels, here is the 'user manual' :1. You choose your wall to place the opening.2. You just place a door frame in the wall.3. You set the glass door half open (or closed) in grey.4. You reduce the depth (thickness) of this glass door in white and voila !

Cool bdfd! Great trick. It looked so good I thought you had a separate model! Thanks.

About the heat pump. I try to create a house that has very small energy needs for heating. Vertical geothermal will probably not be cost effective anymore. So I am thinking about an air/water heat pump.Winters in the Netherlands are getting warmer and warmer anyway